I finished making my mainsail flotation device today, now I wait till the ice melts, and maybe a little longer, to test it. Here's some pics...
The foam: 16 pounds of bouyancy, 2" thick each side.
The nylon ripstop tube, with abrasion resistance and access to foam.
Mounted on the head of the mainsail.
Close-up of front.
How do ya like my artsy fartsy retro B&W pics and the Adams-esque play of shadow and light!